William g



W. G. RBDMAN. DENTAL PLUGGER.

No,-61',46.0. Patented Jan. 22, 1867.

l ,Eu/eil 02? izae.. I 5% @WM @y @Mm/L@ @uitrit gisten @sind @fficev WILLIAM G'. REDMAN, OF LGUISVILLE, KENTUCKY. Lettera .Patent No. 61,460, dated January 22, 1867.

IMPROVEMENT IN DENTAL PLUGGEBS.

T0 ALL WHOM IT MAY CON CERN:

Be it known that I, WILLIAM'G. REpnAN, of Louisville, in the county of Je'erson, and State of Kentucky, have invented-: 1l new and improved Gold Condenser; Yand Ido hereby declare-that the following is a full, clear, and exact' descriptionthereof. i

v The nature of myl invention consists in constructing an instrument for condensing gold in the process of -lling teeth, und for preparing the cavity for illinz. whereby the operation is much more perfectly-performed than by the oldmethod. i

And to enable others skilled in the ortv to make and usemy invention, I will proceed to describe its construction and operntion,.referencc being had to the-accompanyingdrawings, which form a part of .this specication, and to the letters of reference marked thereon.

Figure l represents a side view of the instrument complete.

Figure 2 is alongitudinal section of fig. 1, showing the interns-l arrangement of the ports of the instrument.

Figure 3, represents a modification of the hammer-belve.

Similarletters indicate corresponding parts.

The machinery by which this instrument is operated is enclosed in a metallic case, A end A', the hammer B, with its spring helve, b, being-exposed to view. The arm G, and the spring d, which act directly onV the hammer-helve, are enclosed-in that part of the case marked A. D is'the bar, the top end of which receives -the blow Ifrom the hammer. This bar is in two pieces, the two being connected together bv a'swivel joint at E. The upper portion of the bar is represented by D. f is the 1et-o` lbar,.which moves up and down with D and D. gis a movable inclined plano, the position of which determinesthe force of the blow. The lower end of f is kept from D', and against the casing, by a little spring, z', which isnttached to f, and bears against D', The lower'end of the bar D is split into two or more parts, which parts form springs to keep the condensing tool or chisel in place. Further lup'tliere is a shoulder within thecase at e, against which rests one end of a spiral spring, seen at h. The other end of this spring bearsngainst n. portion, j, of the casing. This portion of the casing is attached by a screw, as seen in'iig. 2, at It. The upper portion of the bar D has a long slot in it which receives the -end ofthe arm C. The end 'of the arm O is seen -at Z, projeotingthrongh the slot' the lower end of the slot is indicated by dottedlinc at m. The projecting' end of thearm Ckrests in the top end of the leto' bnr f, that end of f being in the form of a fork to -receive it. The arm C works upon a pin` or fulcrum, n, the other Vend being attached' to the spring-belve of the hammer, at-vo. This en d of C is forked with a pin, at o, which works in the slot seen ut p, in the spring-belve. Under the spring-belve, andA attached to the casing at S', is e spring, d. The end of the spring-hlve b, as well'as the arm or lever C, has room to move and operate in the casing A". The casing A also allows-*play for the parts which it contains. The upper end of the oar D', when raised to receive the blow, passes through the cap of the case at r. lThis cap is seenat u, and screws on ns seen in the drawing. V V are disks attached to the bar. One, V', isseen near the top of the bariD', where it acts as a guide for the bar. The other disk,l V, forms a portion o f the swivel joint. There is another plate or partial disk, 1v, attached to the bnr D it is slotted to the let-o' bnr f. The barf works inthis slot, being secured and kept in position by a pinor bolt, X. At z there isn stop, the end of which projects through the case. The other end is attached to a spring, vindicated in the drawing by c. This spring, s, is attached to the case at its upper end, as is indicated in the drawing by a red line. By crowding this stop in the working of the machinery is immedintelystoppcd..

To operate with the instrument itis held as one would hold o. pen between the thumb and forefinger, with A hanging over the back of the hond. Now by pressing down on the pointer tool d', the lbnr D D is raised, 'carrying the let-olf bar f with it. The spiral spring athis compressed and the end of the arm C is raised; this brings the end of the springhelve down and raises the hammer. When the lower end of the let-o bin-f reaches the inclined plane at g, the upper cud of f is forced olf the end of the arm C; when this takes place the bar is not high enough. to receivcth'e blow, but the recoil of the spiral 4spring throws the top of the bar-through the casing at 1', where it receivesthe blow from the hammer. 4The liberation of the arm C, and the recoil of the spring, are of course. simultaneous'movemcnts. .Afterv a blow is struck the machinery is in position for another blow from a like pressure upon the point. If a light blow be desired, move the inclined plane g down 5 aman 2 for a. heavy blow move it up. The inclined plane is moved up or down by tho thumb of the operator, and the force of the blo'w is determined accordingly, as the inclined plane regulates the elevation of the li`ammer. The flat spring d, which operates against the short end of the helve b, is strained when thehammer rises, and when the arm C is liberated the recoil of the spring throws the hammer down with a. force proportioned to its elevation. The swivel joint allows the lower portion of the bar D to rotate with the tool, which motion is necessary when preparing a cavity for filling. The modification represented in fig. 3 relates to the slot in the helve of thehammer. When the pin or bolt which works in this slot reaches the o'set at z', the hammer drops, andthe pressure being continued, it rises again and 'strikes the b low required. After the blow is given, the spring represented by 2` in the drawing carries the bolt back to its place. By this arrangement a light blow can be given before the main blow is struck. It will be noticed that when the instrument is at rest as represented in the, drawing, the hammer does not rest upon the top of the case but stands above it. This is because the springhelve strikes the casing A at 11, and rests there, so that the main force of the blow is given by the momentum of the hammer acting upon the spring-belve from the point 11. After thc blow, the spring re-acts and remains as seen in the drawing. i

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The casing as represented in form by A and A', containing the bar D D', the let-off'barf, the spiral spring h, the spring 'and stop z and z', the vdisks V and V', the partial disk or joint piece w, and the swivel joint E, construcetd substantially as dese'ribed for the purpose specified.

2. I claim the arm or lever 0,' connected with the spring-belve, by slot and bolt, substantially as described.

3. I claim the spring-helse b, and its connection with the case at 11, and also the spring d, acting against 'the helve.

WILLIAM Gr. REDMAN.

Witnesses:

OSCAR B. Tenes,

JAS. K. LEMON. 

